CN103712473B - Boosted-ventilation direct air cooling tower - Google Patents
Boosted-ventilation direct air cooling tower Download PDFInfo
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- CN103712473B CN103712473B CN201210375369.1A CN201210375369A CN103712473B CN 103712473 B CN103712473 B CN 103712473B CN 201210375369 A CN201210375369 A CN 201210375369A CN 103712473 B CN103712473 B CN 103712473B
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- finned tube
- air cooling
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Abstract
Boosted-ventilation direct air cooling tower, the invention belongs to field of heat exchange, the Air-Cooling Island and air type of drive that more particularly to air-cooled type generates electricity.Due to temperature winter summer difference, difference round the clock, frequently natural wind, along with the multiple change of wind speed, wind direction, make simple gravity-flow ventilation, the air cooling tower of simple machine power secondary ventilation, it is difficult to meet air cooling requirement now, the present invention is using the condensation triangle being made up of in gravity-flow ventilation cylinder lower periphery arrangement axial flow blower and finned tube etc..Make the present invention while air cooling tower summer capacity is greatly improved, significantly weaken the harm of strong wind, and using the superfluous draft in winter air cooling tower, its energy is reclaimed by axial flow blower, reversion blower fan can extract hot-air in tower out, circulate the finned tube surprisingly freezed.The present invention can be matched in the Direct Air-Cooled and indirect air cooling unit of various scales.
Description
Technical field
The invention belongs to the gravity-flow ventilation that field of heat exchange, the air-cooled type more particularly to using air as cooling medium generate electricity
The air type of drive of direct air cooling system.
Background technology
Due to the worsening shortages of water resource, pass through the direct or indirect condensing turbine exhaust steam in metal surface, energy using air
The air-cooled type that firepower power station and nuclear power station water consumption is greatly reduced generates electricity, widely used in China and the whole world.
Because the thermal capacitance of air is only the 1/4 of water, density is only the 1/1000 of water, the steam turbine exhaust steam condensation that air-cooled type generates electricity
Latent heat enters the mode of atmospheric environment, can only be taken away by the elevated heat content of air themperature, air dosage is just especially huge, so vapour
Machine back pressure is especially close with atmospheric environment relation.
And northern China is exactly in the westerlies of the Northern Hemisphere, frequently dry all the year round, some areas are accumulative to be up to 3
~4 thousand hours, extremely hot plus the severe cold summer in winter, day and night temperature is up to more than ten 20 degrees Celsius.Existing Electric Factory Air-Cooling mode, causes vapour
Machine back pressure constantly fluctuates widely, and neither economic security wastes the energy again for this.
In the summer high temperature period, air in radiator temperature rise reduce, no matter mechanical draft or gravity-flow ventilation, its cool down
Ability is greatly reduced, and common method is cooled using work of water sprinkling for better material moisture, is improved using the evaporation of water on a heat sink cold
But effect, but for back pressure still between 20~30kPa, this not only brings the consumption of water resource to steam turbine at full capacity, due also in air
The fouling on heat radiator fin of dust, impurity be difficult to clean off, also to reduce air cooling effect when not spraying water on the contrary.
Dry the period, natural ventilation air-cooling tower makes the natural wind of bottom horizontal flow sheet, is formed outside air cooling tower serious non-homogeneous
Pressure field, it is only capable of by turning down face come the shutter in wind direction, partly to reduce the interference to air cooling tower cooling performance, due to
Simple structure in this tower from wet type cooling tower, can not still change summer natural wind makes air cooling tower circumference air intake total amount significantly
The result of reduction, steam turbine back pressure is usually set to rapidly rise to 30~more than 40kPa, power plant can only be forced to reduce load, with anti-jump
Lock accident occurs.
Period in winter, temperature is often between -10~-30 DEG C, and some areas are even up to less than -40 DEG C, although passing through pass
The shutter of small Air-Cooling Island cuts off blower fan, can significantly reduce cold air flows, more cruel than summer due to winter air density
The hot period is high by 20~30%, and up to 50~70 DEG C again of temperature rise, up to 2~4 times of the summer high temperature period, lead to nature in radiator
Wind tower produces 300~400Pa superfluous exhausting ability, even if the random change of wind direction by a small margin, it is easy to cause office
Portion's excess air intake and freezing fin radiator, occur for anti-event here, be usually taken it is artificial improve steam turbine back pressure to 8~
More than 10kPa, that is, exhaust temperature is improved, to sacrifice the thermal efficiency, generated energy is reduced, to realize preventing freeze in winter target.
For these reasons, the average back pressure of the steam turbine of air-cooled type generating set is generally higher by 1 than wet type water-cooled generator group
(winter)~3 (summer) times, plus the influence of wind, the kwh coal consumptions for causing air-cooled type to generate electricity, higher by 5 than the generating of wet type water cooling~
7%, small unit is even up to more than 10%.
Utility model ZL201020667597.2, become draft gravity-flow ventilation tower patent, by using increase movable air duct and
Tower diameter improves the exhausting ability of summer gravity-flow ventilation tower, but in the too big area of wind-force, for strong wind security consideration, no
Movable air duct height may be significantly increased.
Utility model ZL201020500302.2, drive wind air cooling tower patent, by tower construct radial separations curtain and
Tower wall top set air outlet valve, to overcome destruction of the ambient wind to natural ventilation air-cooling tower cooling effect, for be completed from
Right aeration tower, it is clear that can not possibly go to set air outlet valve again.
Patent of invention 200910083854.X, thermal power generation combined ventilation direct air cooling system patent, it is intended to using machine power
With natural natural and mechanical combined ventilation mode, to reduce high temperature, strong wind to the adverse effect of air-cooled type generating set.Because steam condenses list
There is problem in the arrangement of member and fin radiator, make it be difficult to be commercialized.
In addition, above-mentioned patent also lacks understanding and preferable solution for running the problem of existing in the winter time.
The content of the invention
In view of existing nature and machine power secondary ventilation direct air cooling system, make generating set summer, blowing period, winter vapour
Machine back pressure is high, and kwh heat consumptions, cost are high, the deficiency of existing patent improvement project.The present invention is open a kind of to society, can overcome existing
Luggage puts shortcoming, boosted-ventilation direct air cooling tower.
1. boosted-ventilation direct air cooling tower, it is made up of air duct, radiator, blower fan etc., it is characterised in that form radiator
Triangle is condensed as shown in Fig. 2 being made up of steam-distributing pipe (1), finned tube (2), condensation water collection pipe (3), axial flow blower (4)；
The motor for driving axial flow blower (4) is dynamoelectric and power generation dual-purpose motor；The tube pitch of finned tube (2) as shown in Figure 3, Figure 4, the first wing
The row between column pitch A, the 3rd finned tube (24) and the 4th finned tube (25) between piece pipe (22) and the second finned tube (23)
Spacing A, the ratio of the column pitch B between the second finned tube (23) and the 3rd finned tube (24)：A/B=0.2~0.35 or 0.3
~0.5 or 0.5~0.7 or 0.7~0.99；First finned tube (22), the second finned tube (23), the 3rd finned tube (24),
Four finned tubes (25) section is using circular；By it is some condensation triangles in the way of shown in Fig. 5, Fig. 6, with inlet steam house steward (5),
Annular steam house steward (6), air duct (7) composition boosted-ventilation direct air cooling tower.
2. boosted-ventilation direct air cooling tower, it is made up of air duct, radiator, blower fan etc., it is characterised in that positive draft is direct
The radiator of air cooling tower is made up of 6~12 or 13~30 or 31~100 condensation triangles.
3. boosted-ventilation direct air cooling tower, it is made up of air duct, radiator, blower fan etc., it is characterised in that a condensation triangle
In the quantity of axial flow blower (4) be 1~3 or 4~6 or 7~30；Axial flow blower (4) air outlet is to finned tube (2)
Between air duct for one autonomous channel of an axial flow blower or two axial flow blowers share a passage or three and
One passage of above axial flow blower.
4. boosted-ventilation direct air cooling tower, it is made up of air duct, radiator, blower fan etc., it is characterised in that air duct (7) profile
For cylinder or hyperbola or ellipse；Air duct is highly 0.3~0.6 times or 0.6~1.0 of cylinder top outlet diameter
Times or 1~6 times.
5. boosted-ventilation direct air cooling tower, it is made up of air duct, radiator, blower fan etc., it is characterised in that composition condensation triangle
Axial flow blower (4) as shown in fig. 7, set rotating shaft in side, can open, and the angle more than 90 °.
6. boosted-ventilation direct air cooling tower, it is made up of air duct, radiator, blower fan etc., it is characterised in that in axial flow blower
(4) import sets flexible sheet material and it use as ventilation stopping curtain.
7. boosted-ventilation direct air cooling tower, it is made up of air duct, radiator, blower fan etc., it is characterised in that axial flow blower (4)
Using the driving air of multiple-blade slow speed or by empty gas-powered dual-purpose type blade.
8. boosted-ventilation direct air cooling tower, it is made up of air duct, radiator, blower fan etc., it is characterised in that in condensation triangle
Finned tube (2) is arranged using Fig. 8 vertical mode, available for the cooling to liquid, you can for indirect air cooling system.
Invention has the positive effect that more than：
1. substitute traditional shutter that can only reduce air quantity with the axial flow blower (4) equipped with dynamoelectric and power generation dual-purpose motor,
The condensation triangular unit of composition, greatly strengthen the regulatory function of the air mass flow of air cooling tower.Summer high temperature period, axial flow blower
Air-supply is combined with air cooling tower exhausting, cooling air quantity can be made to be multiplied, and then makes the increase of radiator overall heat-transfer coefficient, initially
The temperature difference, steam turbine back pressure are greatly reduced.
2. arranging corresponding autonomous channel between the axial flow blower and fin radiator of a condensation triangle, it is easy in summer
Dry the period, when dry Cooling heat radiator circumferencial direction, short transverse blast significantly change, intake is carried out timely, respectively
Regulation and control.Face carrys out the condensation triangle in wind direction, it might even be possible to blocks pouring into for air quantity using wind turbine power generation；Cross-wind direction, wind
Machine can distinguish power transmission, or full power or partial power operation by frequency conversion system, to make up the local air intake of natural wind reduction
Amount, ensure the low back pressure operation of steam turbine.
3. winter temperature is low, cooling air amount ratio summer is reduced at double, but for big-and-middle-sized air cooling power plant, its flow is still
So very huge, up to more than 40 DEG C, air cooling tower surplus draft is multiplied air for temperature rise in radiator, using equipped with electronic
The axial flow blower (4) of electricity generating dual purpose motor, generating excitation is loaded, controls the flow of its cooling air, and will be produced before and after fan
Raw pressure difference potential energy is electric energy；It is different to each axial flow blower loading by automatic control loop when winter dries
Generating excitation, the thermic load of corresponding local radiator is accurately controlled, both prevented winter to dry the period, radiator
It is freezing, pressure difference potential energy caused by air cooling tower has been reclaimed again, while also reached air cooling steam turbine in the winter time, with the identical of wet type cooling unit
The effect of low back pressure operation.
3. in 0 DEG C~10 DEG C periods of calm or gentle breeze and temperature, axial flow blower (4) can be placed in the unlatching shown in Fig. 7
Position, air flow resistance during reducing gravity-flow ventilation.
4. Round fin pipe coefficient of heat transfer, the increment rate increased with windward side wind speed is more than single row of tubes and elliptical tube, uses
Round fin pipe is advantageous to improve cooling effect during the operation of summur gale amount；Using A ＜ B column pitch, circle can be effectively improved
The emission capacity of finned tube.
5. axial flow blower (4) is located at air cooling tower in outside, easy access；Fan inlet sets flexible sheet material and it use as ventilation stopping curtain, subtracts for winter
When few air quantity and parking etc. need, adjustment or cut-out axial flow blower, condensation triangle and extraneous air duct；Blower fan reversely revolves
Turn, the hot-air in tower can be extracted out, improvements defrosting processing is carried out to the radiator surprisingly freezed.
6. boosted-ventilation direct air cooling tower, the direct air cooling system available for 10MW~1500MW cooling loads.
7. the shape and orientation of finned tube and hot media channel in adjustment condensation triangle, i.e., shown in Fig. 8, the present invention can be used for
Indirect air cooling system.
Brief description of the drawings
Accompanying drawing 1, ZL200920242941.0 patents, using the direct air cooled condenser top view of gravity-flow ventilation.
Accompanying drawing 2, condensation triangle top view of the present invention, by steam-distributing pipe (1), finned tube (2), condensation water collection
Manage (3), axial flow blower (4) composition.
Accompanying drawing 3, the amplification plan view of composition finned tube (2), to illustrate the relation between fin tube pitch A, B.
Accompanying drawing 4, finned tube (2) axial view, i.e. G--G views in accompanying drawing 2 are formed, further illustrate fin tube pitch
A, the relation between B.
Accompanying drawing 5, the front view of boosted-ventilation direct air cooling tower.
Accompanying drawing 6, the top view of boosted-ventilation direct air cooling tower.
Accompanying drawing 7, axial flow blower (4) are in the top view of the present invention of opening.
Accompanying drawing 8, in of the invention, finned tube (2) uses the condensation triangular unit three-dimensional view that vertical mode is arranged.
In figure：
1. steam-distributing pipe.
2. finned tube.
21. the radiating fin on finned tube.
22. first row finned tube.
23. secondary series finned tube.
24. the 3rd row finned tube.
25. the 4th row finned tube.
3. condensation water collection pipe.
4. axial flow blower.
5. Air-Cooling Island steam inlet house steward.
6. annular steam house steward.
7. air duct.
A. the column pitch between the row of the row of finned tube first and two, the 3rd and four.
B. the column pitch between finned tube second and three arranges.
Embodiment
Embodiment is illustrated with 660MW Air-cooled Units：
120 meters of zero rice diameter of air cooling tower, 90 meters of outlet diameter, air cooling tower are total high 150 meters；30 meters of hot air inlet height；
Condense 30 meters, altogether 36 of triangle height；2,000,000 square metres of the radiator gross area, 16666 square metres of front face area；Fin ratio
120。
35 DEG C of temperature, air duct draft 90Pa, 2.7 meters of windward side maximum wind velocity, blower fan quantity 72, blower fan provide total head
50Pa air-supply power, air quantity 585m3/ s, 9.14 meters of blower fan diameter, consume general power 3000kw, steam turbine back pressure 18kPa.
20 DEG C of temperature, air duct draft 100Pa, 2.7 meters of windward side maximum wind velocity, blower fan quantity 72, blower fan provide 40Pa
Partial pressure, air quantity 585m3/ s, 9.14 meters of blower fan diameter, consume general power 2400kw, steam turbine back pressure 10kPa；
10 DEG C of temperature, air duct draft 106Pa, 2.7 meters of windward side maximum wind velocity, blower fan quantity 72, blower fan provide 35Pa
Partial pressure, air quantity 585m3/ s, 9.14 meters of blower fan diameter, consume general power 2100kw, steam turbine back pressure 6kPa.
5 DEG C of temperature, air duct draft 122Pa, 2.7 meters of windward side maximum wind velocity, blower fan quantity 72, blower fan provide 18Pa points
Pressure, air quantity 585m3/ s, 9.14 meters of blower fan diameter, consume general power 1000kw, steam turbine back pressure 4.2kPa.
0 DEG C of temperature, air duct draft 140Pa, 2.7 meters of windward side maximum wind velocity, blower fan quantity 72, blower fan provide 0Pa points
Pressure, air quantity 585m3/ s, 9.14 meters of blower fan diameter, consume general power 0.00kw, steam turbine back pressure 3.6kPa.
- 5 DEG C of temperature, air duct draft 165Pa, 1.8 meters of windward side maximum wind velocity, blower fan quantity 72, blower fan offer -40Pa
Partial pressure, air quantity 390m3/ s, 9.14 meters of blower fan diameter, generate electricity recovery general power 650kw, steam turbine back pressure 3.0kPa.
- 15 DEG C of temperature, air duct draft 220Pa, 1.38 meters of windward side maximum wind velocity, blower fan quantity 72, blower fan offer-
95Pa partial pressures, air quantity 300m3/ s, 9.14 meters of blower fan diameter, generate electricity recovery general power 1200kw, steam turbine back pressure 3.0kPa.
- 25 DEG C of temperature, air duct draft 300Pa, 1.04 meters of windward side maximum wind velocity, blower fan quantity 72, blower fan offer-
175Pa partial pressures, air quantity 240m3/ s, 9.14 meters of blower fan diameter, generate electricity recovery general power 1800kw, steam turbine back pressure 3.0kPa.
- 35 DEG C of temperature, air duct draft 370Pa, 0.86 meter of windward side maximum wind velocity, blower fan quantity 72, blower fan offer-
255Pa partial pressures, air quantity 200m3/ s, 9.14 meters of blower fan diameter, generate electricity recovery general power 2200kw, steam turbine back pressure 3.0kPa.
Claims (8)
1. boosted-ventilation direct air cooling tower, it is made up of air duct, radiator, blower fan, it is characterised in that form the condensation three of radiator
Angle, it is made up of steam-distributing pipe (1), finned tube (2), condensation water collection pipe (3), axial flow blower (4)；Drive axial flow blower (4)
Motor be dynamoelectric and power generation dual-purpose motor；Between finned tube (2) internal the first finned tube (22) and the second finned tube (23)
Column pitch A between column pitch A, the 3rd finned tube (24) and the 4th finned tube (25), the second finned tube (23) and the 3rd fin
Manage the ratio of the column pitch B between (24)：A/B=0.2~0.35 or 0.3~0.5 or 0.5~0.7；First finned tube
(22), the second finned tube (23), the 3rd finned tube (24), the 4th finned tube (25) section are using circular；By some condensation triangles
With annular steam house steward (6), inlet steam house steward (5), air duct (7) composition boosted-ventilation direct air cooling tower.
2. boosted-ventilation direct air cooling tower according to claim 1, it is characterised in that form the condensation triangular number of radiator
Measure and formed for 6~12 or 13~30 or 31~100.
3. boosted-ventilation direct air cooling tower according to claim 1, it is characterised in that the axle stream wind in a condensation triangle
The quantity of machine (4) is 1~3 or 4~6 or 7~30；Axial flow blower (4) air outlet is to the air between finned tube (2)
Passage is that one autonomous channel of an axial flow blower or two axial flow blowers share a passage or three and above axle stream wind
One passage of machine.
4. boosted-ventilation direct air cooling tower according to claim 1, it is characterised in that air duct (7) profile for cylinder or
Hyperbola or ellipse；Air duct is highly 0.3~0.6 times or 0.6~1.0 times or 1~6 times of cylinder top outlet diameter.
5. boosted-ventilation direct air cooling tower according to claim 1, it is characterised in that the axial flow blower of composition condensation triangle
(4) rotating shaft is set in its side, rotarily opens it, and the angle more than 90 °.
6. boosted-ventilation direct air cooling tower according to claim 1, it is characterised in that set in axial flow blower (4) import
Flexible sheet material and it use as ventilation stopping curtain.
7. boosted-ventilation direct air cooling tower according to claim 1, it is characterised in that axial flow blower (4) is used and can both driven
Dynamic air again can be by empty gas-powered dual-purpose type blade.
8. boosted-ventilation direct air cooling tower according to claim 1, it is characterised in that the finned tube in composition condensation triangle
(2) vertical to arrange, medium is liquid in pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210375369.1A CN103712473B (en) | 2012-10-08 | 2012-10-08 | Boosted-ventilation direct air cooling tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210375369.1A CN103712473B (en) | 2012-10-08 | 2012-10-08 | Boosted-ventilation direct air cooling tower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103712473A CN103712473A (en) | 2014-04-09 |
| CN103712473B true CN103712473B (en) | 2018-01-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210375369.1A Expired - Fee Related CN103712473B (en) | 2012-10-08 | 2012-10-08 | Boosted-ventilation direct air cooling tower |
Country Status (1)
| Country | Link |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107462081B (en) * | 2015-04-23 | 2019-06-14 | 山东大学 | The horizontally disposed indirect cool tower of frame type A cooling unit and its cooling means |
| CN105066730B (en) * | 2015-07-24 | 2017-03-01 | 中国电力工程顾问集团西北电力设计院有限公司 | Flos Nelumbinis condenser and hertz dry cooling systems |
| CN105547004A (en) * | 2016-01-25 | 2016-05-04 | 北京嘉普元丰科技发展有限公司 | Mechanical assisted natural ventilation cooling tower |
| CN105783540A (en) * | 2016-04-19 | 2016-07-20 | 华北电力大学 | Mixing ventilation air-cooling condenser |
| CN107976088A (en) * | 2016-10-24 | 2018-05-01 | 李宁 | A kind of closed cycle cooling process and device |
| CN108088276B (en) * | 2016-11-23 | 2021-06-22 | 成都聚实节能科技有限公司 | Water-saving cooling process and device for north industrial circulating water |
| CN107120980A (en) * | 2017-04-20 | 2017-09-01 | 华北电力大学 | Vertically arranged mixed ventilation direct air cooling system outside a kind of air cooling tubes condenser tower |
| CN110736358A (en) * | 2018-07-19 | 2020-01-31 | 华北电力大学 | mixed ventilation three-tower-combined technology |
| CN111397431B (en) * | 2020-05-09 | 2022-09-09 | 济南蓝辰能源技术有限公司 | Angle-variable rotary indirect air cooling anti-freezing air guide system |
| CN113970254A (en) * | 2020-07-22 | 2022-01-25 | 成都聚实节能科技有限公司 | Full-countercurrent direct air-cooling condensing method |
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| GB191418036A (en) * | 1914-07-30 | 1915-04-15 | Donald Barns Morison | Improvements in Steam Condensers. |
| GB1196461A (en) * | 1967-02-08 | 1970-06-24 | Gkn Birwelco Ltd | Improvements in or relating to Heat Exchanger Assemblies |
| GB1483730A (en) * | 1973-12-08 | 1977-08-24 | Gkn Birwelco Ltd | Heat exchanger assemblies |
| CN1042261C (en) * | 1992-12-21 | 1999-02-24 | 北京大学 | Wind-controlling property testing system and wind-controlling design plan for dry-type cooling tower |
| US5653281A (en) * | 1995-12-20 | 1997-08-05 | Hudson Products Corporation | Steam condensing module with integral, stacked vent condenser |
| CN2809557Y (en) * | 2005-06-20 | 2006-08-23 | 张延丰 | Plate type air condenser |
| CN201032405Y (en) * | 2007-02-04 | 2008-03-05 | 张建东 | Air condenser |
| CN101614486B (en) * | 2009-07-22 | 2012-01-18 | 北京布鲁斯盖环保科技发展有限公司 | Mechanical draft indirect dry cooling system |
| CN202329263U (en) * | 2011-09-15 | 2012-07-11 | 成都深蓝高新技术发展有限公司 | Air cooling and condensing device |
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- 2012-10-08 CN CN201210375369.1A patent/CN103712473B/en not_active Expired - Fee Related
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